tcpSendTimeout=NUM, -- The timeout (in seconds) of a TCP write attempt
tcpRecvTimeout=NUM, -- The timeout (in seconds) of a TCP read attempt
tcpFastOpen=BOOL, -- Whether to enable TCP Fast Open
- ipBindAddrNoPort=BOOL, -- Whether to enable IP Bind Address No Port
+ ipBindAddrNoPort=BOOL, -- Whether to enable IP_BIND_ADDRESS_NO_PORT if available, default: true
name=STRING, -- The name associated to this backend, for display purpose
checkName=STRING, -- Use STRING as QNAME in the health-check query, default: "a.root-servers.net."
checkType=STRING, -- Use STRING as QTYPE in the health-check query, default: "A"